In this task, you are given an article. Your task is to summarize the article in a sentence.

If emergency departments are struggling then it is a good bet the entire system is under strain.
That is because the A&E stats reflect not only the demand on the system - how many patients are turning up, but also can indicate how quickly patients are moving through the hospital system.
So if there are very few beds available on the wards it creates a log-jam in A&E and patients have to wait on trolleys for space to become available.
A knock-on effect can be seen in ambulances queuing outside.
Problems are made worse if there are delays in releasing patients from hospital because a care package is not in place for them to go home to.
That is why many argue making sure social services are properly resourced is a key element in trying to tackle the pressures facing the NHS.
And then there is the impact on planned operations. If intensive care units, for example, are full then there are no available beds there for patients who need them to recover from serious scheduled operations.
If that is the case -  some elective surgery will inevitably get postponed.
Late last year, the Welsh Government pledged an extra Â£45m to health boards to try make sure scheduled, elective surgery and treatments are  more protected this winter.
NHS Wales chief executive Dr Andrew Goodall said it was still too early to tell in terms of numbers but hospitals needed to ensure elective surgery was managed in a "sensible manner" as there was a duty to patients.
Another interesting thing to note - sometimes the figures show that unscheduled care units actually see a greater number of patients during the summer months - due to trips, slips, falls, bumps and so on.
But in winter the NHS often has to deal with more severely-ill patients, for example elderly patients who have breathing problems.
These need much more care, spend more time in the system and need more support to get better.
COMPARING WALES WITH ENGLAND
Historically A&E waits have been longer in Wales than in England. Some experts argue that is because there is a bigger mismatch in Wales between the number of beds available and the demand for them.
The difference might also reflect demographic factors -  for example the Welsh population as a whole being older sicker and less well-off than other parts of the UK.
It is not straightforward comparing Wales with the NHS in England, because the "clock" starts differently when patients arrive.
For those in Wales, the waiting time starts being recorded as soon as the patient is registered inside the A&E department - or when the ambulance crew notifies the desk they have arrived outside.
In England, the arrival time starts when the patient is handed over or 15 minutes after the ambulance arrives at A&E, whichever is earlier.
Leaked data for NHS England seen by BBC News shows the figure reached a low of 75.8% on 3 January but had recovered to 82.4% last week.
HOW DO DIFFERENT HOSPITALS COMPARE?
ARE THINGS GETTING MORE DIFFICULT?
Looking back at A&E waiting times statistics in Wales over recent years - what is clear is that in each successive year things appear to be getting ever more difficult - despite the Welsh Government ploughing more money each year to help health boards deliver they're winter plans.
What is not in doubt though is staff on the front line are trying hard to make sure patients get treated safely - even when the pressure is really on.
The problem is the pressures year on year show little sign of easing.
Statistics showing the length of time patients have to spend in accident and emergency have been described as taking the temperature of the entire NHS system.

The 57-year-old, from Montrose, was killed north of Dunkeld, near Jubilee Bridge, in Perthshire.
Several other stretches of the A9 have been the scene of fatal and serious accidents this year.
November was marked by the death of a couple in a two-car crash near Dalwhinnie.
Care assistant Dennish Michael and nurse Manju Dennish, both 32 and from Inverness, were originally from India.
Earlier in the month, the parents of a five-year-old boy and three-year-old girl were taken to hospital after a crash near Calvine, in Perthshire.
In October, three people were killed in a collision near Pitlochry involving four cars. Firefighters described the accident as a "scene of carnage".
Denny couple James Forbes, 73, and his 66-year-old wife wife Anne died when their car was involved in a crash with another car.
The driver of the other car - John Potter, 63, from Scarborough - also died at the scene.
In a separate accident, Roy Greene, 41, a joiner from Kilsyth, died in a collision between a van and tipper truck near Auchterarder.
August saw the deaths of motorcyclist Peter Corris, 54, and wife Jacqueline Corris, 53, from Leyland, Lancashire.
The crash which also involved a car happened three miles south of Dalwhinnie.
Another motorcyclist, Fergus Cooney, 41, from Helmsdale, died in hospital after coming off his bike at Daviot.
Mother-of-two Sharon Topping, 38, from Moodiesburn in Glasgow, was killed after her motorbike hit the central reservation on the A9 near Pitlochry.
The accident happened just hours after buying her first motorcycle.
Her 40-year-old husband Stephen, who was travelling behind her on his own motorbike, collided with her bike and was injured.
In May, two men were injured after a coach with 37 people on board crashed north of the Berriedale Braes.
And in April, 13 elderly holidaymakers were hurt when their coach collided with a lorry near Dalwhinnie.
The same month also saw one of Scotland's most promising chefs was killed in a motorbike crash just hours before he was awarded a top accolade at the Scottish Hotel Awards.
Ryan Young, 38, who was nominated in three categories at the prestigious awards, died after his bike collided with a 4X4 vehicle.
A 44-year-old pedestrian also died after being struck by a lorry a mile north of Dunkeld.
Wintry weather affected travelling conditions earlier this year.
In February, lorry driver Andrew Raeside, of Kirkintilloch, died after his cab plunged 40ft (12m) from a bridge into a loch.
He was driving south on the A9 when his fuel lorry jack-knifed as he was crossing Coronation Bridge at Faskally.
Eight people were hurt in January in two multi-vehicle accidents.
Five cars were involved in a collision during blizzard conditions three miles south of Dalwhinnie, while the other earlier accident happened at the Cromarty Bridge.
The death of lorry driver Gordon Cooper in a crash involving three articulated lorries on Thursday was the latest in a series on the A9 this year.

They say they want the courts to help establish what happened to the plane.
Families of 32 other passengers, mostly Chinese, filed a separate lawsuit in Malaysia, their lawyer has said.
MH370 disappeared on 8 March 2014 while flying from Kuala Lumpur to Beijing with 239 people on board.
Under international agreements, relatives have two years following an air accident to begin legal action.
MH370: What we know
Missing Malaysian's wife seeks $7.6m in damages
Zhang Qihuai, the lawyer for the 12 families, said they were seeking a range of damages, but their goal was to determine the cause of the accident and those who were responsible.
The total compensation requested from Malaysia Airlines, Boeing, engine manufacturer Rolls Royce and insurance companies ranged between 10m and 70m yuan ($1.5m to $10.8m; £1m to £7.6m) per family, Mr Qihuai was quoted by AFP news agency as saying.
Verdicts might not come for two years, he said.
The companies have not commented.
Many relatives were crying as they presented their documents to court officials. Some said they hoped to use the action to obtain more information about the case.
"Today we came to demand our people back. We come every day. We demand to have our people back everyday, we want our relatives," Dai Shuqin, whose sister was on board the flight, told the Reuters news agency.
In Kuala Lumpur, lawyer Ganesan Nethi said he filed a joint lawsuit on behalf of the relatives of 32 passengers last Thursday. He said most were Chinese, along with one American and a few Indians, AP reported.
The lawsuit named the airline, the Malaysian government and its air force and civil aviation department, he said.
It was not immediately clear how many lawsuits have been filed in total or how many cases have been settled in relation to MH370.
Ships in the Indian Ocean are still searching for the missing Boeing 777, in an operation that is estimated to have cost more than $130m (£92m).
Meanwhile, Mozambican civil aviation officials handed over suspected debris from the missing flight to Malaysian experts.
If confirmed, the object found by an American amateur investigator would be the second piece of known debris from the aircraft to be found.
Last year authorities found a piece of the plane's wing on the shore of Reunion island in the Indian Ocean.
The debris could provide fresh clues to the mystery of the flight. Based on satellite communications data, MH370 is thought to have crashed in the Indian Ocean.
"Currently, we are awaiting verification of two more pieces of debris which were discovered recently in Mozambique and Reunion Island respectively," Malaysian Transport Minister Liow Tiong Lai said in a statement.
An interim report will be released by the investigation team on Tuesday marking the two-year anniversary of the disappearance, he said.

Relatives of 12 Chinese passengers of the missing Malaysia Airlines flight MH370 have filed lawsuits in Beijing, one day before the deadline for launching legal action.

